Completed 3 system maintenance verified filters . Cleared drain lines with 2 gallons of drain cleaner. Checked all safety and components. While maintaining system tech came crossed from the following. Main , inducer motor failing inducer motor not draining, cracked housing causing water to leak in furnace cabinet, no collector box on side of 90% furnace. System will run for a little then shut off. System will not run longer for 3 mins. Heat exchanger is completely rusted. Spoke with customer about repair on main level furnace they are wanting a quote on replacing. Basement , system does not have secondary drain pan under furnace. No safety switches. Filter is needing to be changed. Tech has left quote for repairs customer is wanting a quote from install manager when they come out to give quote for main level furnace. They are wanting repairs done same day as install. Upstairs, filter is needing to be changed. 610 April air. Blower is needing to be cleaned , there is no wet switc